Hey there, its Lexius Blackrose. There are many gods and spirits you can work with depending what your ethics and what you want to follow. To start with try using meditation and divination methods such as candle communication to talk to spirits. State that you only accept positive energies and only wish to work with positive beings. Then state your intention such as wanting to learn more in Magick and befriend new beings.
Research Black AND White Magick to understand what beings there are for you. Black Magicians are more likely to work with demons - primarily Goetia Demons and White Magicians often work with Angels. However Magick is Magick and you should wish to work with whoever you would like because it is YOUR evolution!
If you don’t want to work with demons, work with angels and their authorities. If you want to work with demons, you can research them on the Joy of Satan and the Demonic Temple. Before working with your chosen spirit, state who you are and what your intention is.